Estimation of Critical Headway at Small Urban Roundabout

  • Danijela Maslać University of Mostar, Faculty of Civil Engineering
  • Dražen Cvitanić University of Split, Faculty of Civil Engineering, Architecture and Geodesy
  • Ivan Lovrić University of Mostar, Faculty of Civil Engineering
DOI: https://doi.org/10.7307/ptt.v32i1.3155
Keywords: small urban roundabout, estimation of critical headway, measured capacity, model testing

Abstract

Before choosing an intersection project design, an important step is to examine the justification of the construction on the basis of defined criteria. One of the key criteria is the analysis of capacity. Large numbers of roundabout capacity models are present in the world, most of them adapted to the conditions of the country they originate from and they need to be calibrated for local conditions. Key parameters for calibration are critical headway and follow-up headway. Follow-up headway can be measured directly in the field, while critical headway cannot be measured, but is estimated. Many critical headway estimation methods exist (over 30) and each of them provides different values. Different values of critical headway result in different capacity estimation values. This raises the question which method provides more realistic estimations under certain conditions. In this paper, four most frequently used critical headway estimation methods (Raff, Maximum likelihood method, Wu, Logit) were selected to be tested by comparison of theoretical capacity models and actual measured capacity at a small urban roundabout.

Author Biographiesaaa replica rolex repwatches replica rolex watches for men replica iwc watch

Danijela Maslać, University of Mostar, Faculty of Civil Engineering

Danijela Maslać is a Senior Assistant at Department of Transportation  at the University of Mostar, Faculty of Civil Engineering. She received a BSc degree in Civil Engineering, the field Transportation, from University of Mostar, Faculty of Civil Engineering. She is a postgraduate student at the University of Split, Faculty of Civil Engineering, Architecture and Geodesy. She is interested in Urban Traffic, Simulation, Transportation, Transportation Planning, Traffic Engineering,  Traffic Safety, Transport Modeling.

Dražen Cvitanić, University of Split, Faculty of Civil Engineering, Architecture and Geodesy

Dražen Cvitanić  is a Head of Department of Transportation at the University of Split, Faculty of Civil Engineering, Architecture and Geodesy. He received a PhD degree in Civil Engineering, the field Transportation, from University of Split, Faculty of Civil Engineering, Architecture and Geodesy. He is interested in Urban Planning, Simulation, Transportation, Transportation Planning, Traffic Engineering, Accident Analysis, Traffic Safety, Transport Modeling, Road Safety, Highway Engineering.

Ivan Lovrić, University of Mostar, Faculty of Civil Engineering

Ivan Lovrić is a Head of Department of Transportation at the University of Mostar, Faculty of Civil Engineering. He received a PhD degree in Civil Engineering, the field Transportation, from University of Split, Faculty of Civil Engineering, Architecture and Geodesy. He is interested in Civil Engineering, Traffic, Traffic Flow, Highway and traffic engineering.

 

References

Hagring O. Vehicle-Vehicle Interactions at roundabouts and their Implications for the Entry Capacity. PhD Thesis. Lund University; 1998.

Yap YH, Gibson HM, Waterson BJ. An International Review of Roundabouts Capacity Modeling. Transport Reviews. 2013;33(5): 593-616. Available from: doi:10.1080/01441647.2013.830160

Barry CD. Calibration of the HCM 2010 Roundabout Capacity Equations for Georgia Conditions. Master Thesis. Georgia Institute of Technology; 2012.

Giuffrè O, Granà A, Tumminello ML. Gap-Acceptance Parameters for Roundabouts: A Systematic Review. European Transport Research Review. 2016;8(1). Available from: doi:10.1007/s12544-015-0190-4

Pimentel Vasconcelos AL, Maia Seco Álvaro J, César Bastos Silva AM. Comparison of Procedures to Estimate Critical Headways at Roundabouts. Promet – Traffic & Transportation. 2013;25 (1): 43-53. Available from: doi:10.7307/ptt.v25i1.1246

Cvitanić D. Modeliranje kapaciteta i razine usluge nesemaforiziranih raskrižja [Modelling of capacity and level of service at unsignalized intersections]. Magistarski rad. Sveučilište u Splitu; 2000. Croatian

Pimentel Vasconcelos AL, Maia Seco Álvaro J, César Bastos Silva AM, Abreu T, Silva J. Comparison of Roundabout Capacity Models. In: Proceedings of the IASTED International Conference on Modeling: Simulation and Optimatization, 3-5 July 2012, Banff, Canada. Available from: doi:10.2316/P.2012.783-023

Highway Capacity Manual, HCM 2010. Washington DC, USA: Transportation Research Board (TRB), National Research Council; 2010.

Akcelik R. An Assessment of the Highway Capacity Manual 2010 Roundabout Capacity Model. Proceedings of the 3rd International Conference on Roundabouts, Carmel, Indiana. Washington DC, USA: Transportation Research Board of the National Academies; 2011.

Wu N. A universal procedure for capacity determination at unsignalized (priority-controlled) intersections. Transportation Research Part B: Methodological. 2001;35(6): 593-623. Available from: doi:10.1016/S0191-2615(00)00012-6

Brilon W. Roundabouts: A State of the Art in Germany International Roundabout Conference, Transportation Research Board, 18-20 May 2011, Carmel, Indiana, USA.

Tian Z, Vandehey M, Robinson BW, Kittelson W, Kyte M, Troutbeck R, Brilon W, Wu N. Implementing the Maximum Likelihood Methodology to Measure a Driver’s Critical Gap. Transportation Research. Part A: Policy and Practice. 1999;33(3-4): 187-197. Available from: doi:10.1016/S0965-8564(98)00044-5

Wu N. Estimating Distribution Function of Critical Gaps at Unsignalized Intersections Based on Equilibrium of Probabilities. Transportation Research Record. 2012;2286(2286). Available from: doi: 10.3141/2286-06

Abishai P, Yoram S, Sitvanit SL. Evaluation of the Waiting-Time Effect on Critical Gaps at Roundabouts by a Logit Model. European Journal of Transport and Infrastructure Research. 2005;5(1): 1-12.

Johnsons TM. Synthesis of Roundabout Geometric Capacity Measurement: Calibration and Validations to US Field Measurement. Transportation Research Board Annual Meeting, TRB 2012, Washington, D.C.

Published
2020-02-12
How to Cite
1.
Maslać D, Cvitanić D, Lovrić I. Estimation of Critical Headway at Small Urban Roundabout. Promet [Internet]. 2020Feb.12 [cited 2024Nov.23];32(1):103-17. Available from: https://traffic.fpz.hr/index.php/PROMTT/article/view/3155
Issue
Vol 32 No 1 (2020)
Section
Articles

Copyright (c) 2020 Danijela Maslać, Dražen Cvitanić, Ivan Lovrić

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Authors who publish with this journal agree to the following terms:

  • Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
  • Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
  • Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).

Most read articles by the same author(s)